Wagon bolster jack



April 12, 1949.

Filed April 9, 1945 E. H. SCHMIDTKE WAGON BOLSTER JACK 2 Sheets-Sheet l.6 0 WA 0 (V/MIDTIIE Inventor Patented Apr. 12, 1949 signer: ofone-fourth to Wesley.G.

Charles-:Qity} Iowa-.-

nm cationt p 'il Thisinvention relates, toawagons: andhas ion its objectto. facilitate I the dumping of the contents of awagon, 1393.,

Another obiech is to elevate of a wagonbox andhold v it. in raisedpos1t1on while the contents is being-: disch'arged"v from the rear endand atter the contents; oil thewagqn b9 has been discharged to lower theirontend' oi the boxto normal horizontal position for refilling-t A:further object is to facilitate the alllGk, rapid exchange oi the jackfor the rdinary WfifiQQ. bolster which normally supports the. liorwardendof the wagon box over thefront axle,

The above and other objects may be attained by employing my inventionwhiflh fimh die s among its features a jack comprising a had adapted tobe attached to the sand boarder fr nt axle of a wagon, an elevatoradapted 1 r de 9? tween upstanding f the bed, said elevator guides atopposite ends to, be n a apted to s ort wagon fbOX at its iront end, andscrew operated means between the bed and the elevator for litting theelevator and lowering it with rizelatio to the bed. I V

in the drawings:

a wagon looking toward the iorward end and showing 'my-impmvedvwagon'rhox Ja k in lowered position.

Figures? is a wiewzsimilarttofigure ,lishowing the wagonrboxinaeleVatedQosition.

*Figure3 is a topiplen view one wagonbox tack constructed in accordancewith th rin lfimkiQn and showin the levat rt aruyrbrolsen wa e-t9 moreclearly iilustrate theedetails ,.of. ,constr 1ic- --t-i'on.

-Figure' 4-';is=:*a side -'view ..of.@1 3i me. ;3 hqflg :portionslorolten away-to more. c1ear ly,.,i1l,ustrate thedetailsof construction.

Figure 5: is a -t1=ansverse-, sectional 216W talgen on the-line--5-5-oft Figuret l4.

*F'iguie S ish-a blfi HSVGISGE S/fififiiQD-fiL wiew talgen on thequiet--61orFigureteand P Figure T is ai-rragmentary end y-iew pt theiack illustrated in Figures $811161 ttalsenirom the, end nuts tfi jwhichare olster, jack lip;

forward, 11?;

7 Henke,

.1945, stee Metre Tfila'im s (01. 293-11 a bedl1 formed of a In thepresent invention 1 substitute, for the usual wagpnholster my improvedbolster jack d9; g atd generally L6 which will be described inj d'etailjas"followsl" The 'j'ack EST-is best illustrated inFigur'es 3 to 7,inclusive; and comprises H channel section with the flangesturned'upwardly aswillb'e clearly 'seen upon referejrice t'othedrawings.- Formed in "the flanges or the channel section I] and,extending 10 parafiel to the webportioh'thereof, are longitudi naislotsv li i 'the'purpose of which will hereinafter appear?" Welded to" theendsof the flanges are standards the upper'endsof which are piercedas'svz r to receive a stud22 upon which a fulcrum r5 fitter-germspurpose of which'willbe more fully l'ie reinaflr'i" described," ismounted. qWelded "or 20 ends 'of which 2 Figure -1 *is atransversersectional mew through 9 plate 28 formed withotherwise'securedto the channel I] at opposite ends thereofandtbdpposite'side edges are verticallly"'gnrtending "parallefeuides 24* the"upper are-held in "spaced p-arallelrelat i o n by space'r sltisurrounding .tie bolts lii (Eigures 3 and 4): Tie "plates 2.1" arewelded to the inner faces of the flanges "adjacent 'opposite' ends andextend to the e'xtrerrieends' of the web of the channel H to formreinforcements therefor and also help to sustain the guides ,24 invertical position. Welded or otherwise secured .to one pair on.standards 20 near one end'bfthe bed'iisa cross a central opening za" in{which one end of a" screw shaft ifl ,isjournaled. 5 shown, this 'screw'shaft is mounted vfor rota- --tion'=in'a detachab1e pla'tes3l (Figur'eb)which is support'ed'upon the standards-2 oiatthe opposite jen-d' of thebed and. is .lprovided with an aligning' opening-for the reception ofthe opposite end of; the screw shaft. Pinned or otherwise attached -tothe end' 'oi the screwishaft' which projects through the plate 3'! ,is'asock'et 32hav'ing across slotsii jor the reception of acr'oss pincarried by l the crank handle 349's illustratediinfxFigures,'3,

.M n. 'Mounted on the screw shaft 30. for longitudinal ovement parallelto the "axis'of the bed? l6" are P providedwithinte'rnal screw ;;threads3 designed" to m"sh 'Withithe oppositely jhreaded portions "or the shaftso that when the shaft is turned the" nuts will move inopposite dii bSeIi inEig'ure' 6 ea'ch-offthe t h 4 nose with a transverse bore 36"forthe reception 6f" el"transverse1y"extending" pivot 3 and carry at theirouter ends transversely extending shafts 40 upon which lifting rollers41 are rotatably mounted.

Resting upon the lifting rollers 4| and adapted to ride upwardly anddownwardly between the guides 24 is an elevator designated generally 42which comprises an inverted channel member 43 which is adapted tosupport the wagon box and carries adjacent opposite ends cross bars 44which are of a length to extend beyond the width of the channel member43 to serve as guides which ride against the outer edges of the guides24 and prevent longitudinal displacement of the elevator with referenceto the vertical guides. 24.

Welded or otherwise secured to the guides 24 near their lower ends areangle bars 45 which serve as stops or rests for the wheels 4! when theyare in lowered position.

In operation assuming that the truck body or box I is in loweredposition and contains a load preparatory to dumping, when the time fordischarging the contents arrives the crank handle 34 is inserted asillustrated in the drawings so that the cross pin carried therebyengages the cross slots 33 of the socket 32. Upon turning the crankhandle the shaft will be rotated thereby causing the nuts to move awayfrom one another and hence move the adjacent ends of the liftin bars 39toward the outer ends of the bed 16. Due to the fact that the bars 39rest upon the fulcrum rollers 23 it will be obvious that as their lowerends advance toward the fulcrum rollers the opposite ends will be liftedthus causing the lifting rollers 4| to exert a lifting action on theelevator 42 and hence cause the front end of the wagon box l5 to rise soas to discharge the contents through the rear end thereof. Havingdischarged the load the crank 34 is turned to the opposite direction soas to cause the nuts 35 to approach one another thus reversing theoperation and lowering the wagon box to its normal horizontal position.

While in the foregoing there has been shown and described the preferredembodiment of this invention it is to be understood that minor changesin the details of construction, combination and arrangement of parts maybe resorted to without departing from the spirit and scope of theinvention as claimed.

What I claim is:

1. A jack adapted to be substituted for a wagon tically from oppositeends of the bed, an elevator,

movable vertically between the guides, spaced parallel bracketsextending upwardly from the bed near the guides, fulcrum rollers nearthe upper ends of the brackets, journal bearings carried by thebrackets, a screw shaft journaled in, said bearings to rotate about alongitudinal axis parallel with but spaced above the axis of the bed,nuts on the shaft adapted when the shaft is rotated in one direction tomove toward opposite ends of the bed and when the shaft is rotated inthe opposite direction to move toward the center of the bed, lever armspivoted to the nuts and adapted to rest on the fulcrum rollers wherebywhen the nuts approach the fulcrum rollers the free ends of the leverarms will move upwardly adjacent the guides, and means to rotate theshaft.

2. A jack adapted to be substituted for a wagon bolster comprising a bedadapted to be supported on the sand board or front axle of a wheeledvehicle, spaced parallel guides extending vertlcally from opposite endsof the bed, spaced parallel brackets extending upwardly from the bednear the guides, fulcrum rollers near the upper ends of the brackets, ascrew shaft rotatably mounted between the brackets, nuts on the shaftadapted when the shaft is rotated in one direction to move towardopposite ends of the bed and when the shaft is rotated in the oppositedirection to move toward the center of the bed, lever arms pivoted tothe nuts and adapted to rest on the fulcrum rollers whereby when thenuts approach the fulcrum rollers the free ends of the lever arms willmove upwardly adjacent the guides.

3. A jack adapted to be substituted for a wagon bolster comprising a bedadapted to be supported on the sand board or front axle of a wheeledvehicle, spaced parallel guides extending vertically from opposite endsof the bed, spaced parallel brackets extending upwardly from the bednear the guides, fulcrum rollers near the upper ends of the brackets, ascrew shaft rotatably mounted between the brackets, nuts on the shaftadapted when the shaft is rotated in one direction to move towardopposite ends of the bed and when the shaft is rotated in the oppositedirection to move toward the center of the bed, and lever arms pivotedto the nuts and adapted to rest on the fulcrum rollers whereby when thenuts approach the fulcrum rollers the free ends of the lever arms willmove upwardly adjacent the guides, and rollers carried by the free endsof the lever arms.

4. A jack adapted to be substituted for a wagon bolster comprising a bedadapted to be supported on the sand board or front axle of a wheeledvehicle, spaced parallel guides extending vertically from opposite endsof the bed, an elevator movable vertically between the guides, spacedparallel brackets extending upwardly from the bed near the guides,fulcrum rollers on the brackets, a screw shaft rotatably mounted betweenthe brackets, nutson the shaft adapted when the shaft is rotated in onedirection to move toward opposite ends of the bed and when the shaft isrotated inthe opposite direction to move toward the center of the bed,lever arms pivoted to the nuts and adapted to rest on the fulcrumrollers whereby when the nuts approach the fulcrum rollers the free endsof the lever arms will move upwardly adjacent the guides, and rollerscarried by the free ends of the lever arms.

5. A jack adapted to be substituted for a wagon bolster comprising a bedadapted to be supported on the sand board or front axle of a wheeledvehicle, spaced parallel guides extending vertically from opposite endsof the bed, an elevator movable vertically between the guides, crossbars near opposite ends of the elevator for engaging the outer edges ofthe guides to prevent endwise displacement of the shaft, spaced parallelbrackets extending upwardly from the bed near the guides, fulcrumrollers near the upper ends of the brackets, a screw shaft rotatablymounted between the brackets, nuts on the shaft adapted when the shaftis rotated in one direction to move toward opposite ends of the bed andwhen the shaft is rotated in the opposite direction to move toward thecenter of the bed, lever arms pivoted to the nuts and adapted to rest onthe fulcrum rollers whereby when the nuts approach the fulcrum rollersthe free ends of the lever arms will move upwardly adjacent the guides,and rollers carried by the free ends of the lever arms.

6. A jack adapted to be-substituted for a wagon bolster comprising a bedadapted to be supported on the sand board or front axle of a wheeledvehicle, spaced parallel guides extending vertically from opposite endsof the bed, an elevator movable vertically between the guides, saidelevator being adapted to support the forward end of a wagon body,spaced parallel brackets extending upwardly from the bed near theguides, fulcrum rollers near the upper ends of the brackets, lever armsresting on the fulcrum rollers and supporting the elevator at theirouter ends and means to move the inner ends of the lever arms toward oraway from each other whereby the elevator will be lowered or raisedaccording to the direction of movement of the lever arms.

'7. A jack adapted to be substituted for a wagon bolster comprising abed adapted to be supported on the sand board or front axle of a wheeledvehicle, spaced parallel guides extending vertically from opposite endsof the bed, an elevator movable vertically between the guides, saidelevator being adapted to support the forward end of a wagon body,spaced parallel flanges extending downwardly from opposite longitudinalsides of the elevator, cross bars near opposite ends of the elevatorengaging the outer edges of the guides to prevent endwise displacementof the elevator, spaced parallel flanges extending upwardly fromopposite sides of the bed and having longitudinal slots extendingtherethrough, spaced parallel brackets extending upwardly from the bednear the guides, fulcrum rollers near the upper ends of the brackets, ajournal bearing fixed to one pair of brackets near one end of the bed, ajournal bearing removably attached to the opposite pair of brackets, ascrew shaft journaled in said bearings to rotate about a longitudinalaxis parallel with but spaced above the axis of the bed, nuts on theshaft adapted when the shaft is rotated in one direction to move towardopposite ends of the bed and when the shaft is rotated in the oppositedirection to move toward the center of the bed, lever arms pivoted tothe nuts and adapted to rest on the fulcrum rollers whereby when thenuts approach the fulcrum rollers the free ends of the lever arms willmove upwardly adjacent the guides, rollers carried by the free ends ofthe lever arms and engaging the underside of the elevator whereby it maybe moved vertically in the guides upon rotation of the shaft, and a handcrank detachably connected to the shaft for rotating it.

EDWARD H. SCHMIDTKE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 463,254 Pay Nov. 1'7, 1891FOREIGN PATENTS Number Country Date 744,766 France Jan. 26, 1933

